| 摘要 |
PURPOSE:To permit formation of an optical recording medium which has sufficient strength with fewer rays and permits use of both sides by curing an adhesive layer by rays which are about 0.03% in transmissivity of a light source to be used for curing the adhesive layer. CONSTITUTION:One of the optical recording media consists of a light transmissive base 1, a 1st protective layer 2, a recording layer 3 and the 2nd protective layer 4. The recording medium of the same construction is stuck thereto by the adhesive layer 5. A photopolymn. initiator of a radical polymn. system having an effective excitation wavelength range to 290-450nm is incorporated into the adhesive layer 5 so that the adhesive layer 5 is cured when the ray transmissivity of the effective excitation wavelength range is >=0.03%. The adhesive layer 5 can, therefore, be cured even by the light past the light transmissive base 1 and the recording layer 3, by which the generation of the strain of heat and pressure is prevented. The sufficient strength is thus obtd. and the optical recording medium which permits use on both sides of formed. |
